Serums
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The best niacinamide serum for most people is a 4–5% formula, which visibly refines pores, balances oil, and calms redness without irritation; concentrations above 10% offer little extra benefit and can cause flushing in sensitive skin.
Niacinamide (vitamin B3) is the quiet multitasker of a routine: it tempers oil, softens the look of enlarged pores, strengthens the skin barrier, and calms redness. It also plays nicely with almost every other active, which makes it one of the safest serums to add. The key is picking a sensible concentration — more is not better.
Our top pick · Best for oily skin
The Ordinary Niacinamide 10% + Zinc 1%
| Best for | Product | Why it stands out | |
|---|---|---|---|
| Best for oily skin | The Ordinary Niacinamide 10% + Zinc 1% | Niacinamide + zinc for oil control | Check price → |
| Best pore-refining pick | Paula’s Choice 10% Niacinamide Booster | Concentrated, mixable booster | Check price → |
| Best for barrier support | Naturium Niacinamide Serum 12% Plus Zinc 2% | Niacinamide + zinc + hydrators | Check price → |
Niacinamide helps regulate oil, minimizes the look of enlarged pores, strengthens the skin barrier to reduce moisture loss, and calms redness. It also supports a more even tone over time, which is why it appears in so many serums and moisturizers.
Yes. Despite an old myth, modern formulas of niacinamide and vitamin C can be used together without canceling each other out. If you’re sensitive, you can still apply vitamin C in the morning and niacinamide at night.
For many people 10% is fine, but it isn’t more effective than 4–5% and can cause flushing or irritation in sensitive skin. If a 10% product stings, switch to a lower concentration.
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